Expandable shelf



FIG. 1 is a perspective view of the underside of an expandable shelf, incorporating the new design;

FIG. 2 is a bottom plan of the expandable shelf of FIG. 1;

FIG. 3 is a front elevation of the expandable shelf of FIG. 1;

FIG. 4 is a top plan of the expandable shelf of FIG. 1;

FIG. 5 is a rear elevation of the expandable shelf of FIG. 1;

FIG. 6 is a right-side elevation of the expandable shelf of FIG. 1, the left-side being a mirror image;

FIG. 7 is a cross-sectional view of a part of the expandable shelf of FIG. 2, showing the structure cut at line 7—7;

FIG. 8 is a cross-sectional view of a part of the expandable shelf of FIG. 2, showing the structure cut at line 8—8;

FIG. 9 is a perspective view of the underside of an alternative position of the expandable shelf of FIG. 1; and,

FIG. 10 is a bottom plan of a second embodiment of an expandable shelf, an expandable shelf of indeterminate length incorporating the new design. 

The ornamental design for an expandable shelf, as shown and described. 